The scientific theory of states that populations change over time in response to changes in the environment.

a. evolution
b. mutation
c. transmutation
d. natural selection

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.